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High Wind Sample

This page provides a complete sample response for a high wind hazard from the Active Hazards API endpoint. High wind hazards include strong wind warnings, gale warnings, and wind advisories issued by national meteorological services. These alerts follow the Common Alerting Protocol (CAP) standard and are sourced from agencies such as Environment Canada, the U.S. National Weather Service (NWS), and the Australian Government Bureau of Meteorology (BoM).

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High Wind-Specific Properties

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Incident Data

The incident.properties object for a high wind hazard contains standard CAP alert metadata. Key incident properties include:

  • senderName - Issuing agency (e.g., "Environment Canada")

  • headline - Alert headline text describing the wind warning and affected areas

  • description - Detailed alert description with wind speed information and expected impacts

  • severity - CAP severity level (e.g., "Moderate")

  • urgency - CAP urgency level (e.g., "Future, Past")

  • certainty - CAP certainty level (e.g., "Likely, Observed")

  • event - Event type name (e.g., "Wind")

  • effective / expires / onset - ISO 8601 timing fields for the alert window

  • msgType - CAP message type (e.g., "Update")

  • instruction - Recommended actions (may be empty)

  • category - CAP category (e.g., "Met" for meteorological)

  • hazardSeverity - Hazard severity classification (e.g., "WARNING")

  • incidentLocationName - Human-readable location (e.g., "St. John's, Newfoundland and Labrador, Canada")

  • headlineDescription - Full descriptive headline combining alert status and wind details

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Features

The features property contains a GeoJSON FeatureCollection with EXPOSURE_AREA and SMART_ALERT features. Each EXPOSURE_AREA feature represents a zone with a specific severity level (e.g., LIMITED, MODERATE). The collection may also include CAP_INFO features with area descriptions and geocodes in the full response.

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Exposure Areas

High wind hazards may use multiple exposure levels representing different severity zones:

  • Level 0: Limited exposure area - peripheral zone with lower expected impact

  • Level 1: Moderate exposure area - core zone with higher expected impact

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Sample Response

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Note: Coordinate arrays have been replaced with [...] for brevity. In actual API responses, these contain complete GeoJSON coordinate arrays. The incident.properties object has been truncated with "..." to show only key fields. The full response includes additional CAP metadata fields such as note, references, rawMessage, eventCode, and headlineDescription. The features collection includes EXPOSURE_AREA features at different severity levels and a SMART_ALERT feature; CAP_INFO area features (one per alert zone) are also present in the full response but not shown here.

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